Recommended in Program(s): All Challenge Programs, Foundations, Essentials Cycle(s): N/A These flashcards are an excellent interactive learning tool for teaching basic addition, addition facts, and the commutative law. Making the practice of memory work both practical and portable, the Addition set adds ease and simpli Classical Conversations resource: https://classicalconversationsbooks.com/products/tarjetas-de-memoria-suma-la-ley-conmutativa-cc-math-flashcards-spanish-for-addition